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Add promotion implementation.

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This commit is contained in:
Danila Fedorin 2017-07-24 14:37:56 -07:00
parent 7bab3773dc
commit 6919fac18f
2 changed files with 7 additions and 0 deletions
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5
src/org/nwapw/abacus/number/NaiveNumber.java
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@ -48,5 +48,10 @@ public class NaiveNumber implements Number {
return new NaiveNumber(1);
}
@Override
public Number promoteTo(Class<? extends Number> toClass) {
if(toClass == this.getClass()) return this;
return null;
}
}

2
src/org/nwapw/abacus/number/Number.java
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@ -12,4 +12,6 @@ public interface Number {
Number zero();
Number one();
Number promoteTo(Class<? extends Number> toClass);
}